Core, speaker module, and electronic device

This application is a national stage of International Application No. PCT/CN2022/072624, filed on Jan. 18, 2022, which claims priority to Chinese Patent Application No. 202110723281.3, filed on Jun. 29, 2021, and Chinese Patent Application No. 202110938483.X, filed on Aug. 16, 2021. The disclosures of each of the aforementioned applications are hereby incorporated by reference in their entireties.

This application relates to the technical field of electronic devices, and in particular to a core, a speaker module, and an electronic device.

At present, electronic devices such as a personal computer (personal computer, PC), a tablet, and a mobile phone are to be designed increasingly thin to meet consumption requirements. In addition, with a higher consumption requirement, these electronic devices are also to achieve better sound effect experience. For an electronic device in the conventional technology, a thinner speaker module is to be designed to implement lightweight design, but a thicker speaker module is to be designed to achieve a larger vibration amplitude, to achieve better sound effect experience. Therefore, thinness and audio performance cannot be balanced for the electronic devices in the conventional technology.

Embodiments of this application provide a core, a speaker module, and an electronic device, to balance thinning and audio performance of a device.

To achieve the foregoing objective, the following technical solutions are used in the embodiments of this application.

According to a first aspect, some embodiments of this application provide a core. The core includes a diaphragm assembly, a first voice coil set, a second voice coil set, and a magnetic circuit system. The first voice coil set, the second voice coil set, and the magnetic circuit system are located on a same side of the diaphragm assembly, and the first voice coil set and the second voice coil set are fastened to the diaphragm assembly. The magnetic circuit system includes a magnet assembly. The magnet assembly includes a first central magnet, a second central magnet, and a side magnet. The first central magnet is disposed to be spaced apart from the second central magnet. The side magnet is circumferentially disposed around a central magnet set including the first central magnet and the second central magnet. A magnetization direction of the second central magnet is the same as a magnetization direction of the first central magnet. A magnetization direction of the side magnet is opposite to the magnetization direction of the first central magnet. An inner magnetically conductive part is disposed in a gap between the first central magnet and the second central magnet. A first annular magnetic gap is formed between the side magnet, the inner magnetically conductive part, and the first central magnet. A second annular magnetic gap is formed between the side magnet, the inner magnetically conductive part, and the second central magnet. At least a part of the first voice coil set extends into the first annular magnetic gap. At least a part of the second voice coil set extends into the second annular magnetic gap. The first voice coil set and the second voice coil set cooperate with the magnetic circuit system to synchronously drive the diaphragm assembly to vibrate.

For the core provided in this application, designing two voice coils enables the number of turns of voice coils to be far greater than the number of turns of a single voice coil, and a winding length of the voice coils to be longer. As the winding length L of the voice coils is increased, a corresponding power conversion coefficient BL is greater, and a driving force BLi of a speaker module is greater. In addition, on the premise that the driving force remains unchanged, a thickness of a voice coil set and a thickness of the magnetic circuit system may be reduced, to implement a thinning design of the core. Therefore, thinning and audio performance can be balanced to some extent for the core provided in this application. In addition, driven by two voice coils, follow performance of parts of the diaphragm is good. This can not only meet a low frequency requirement, but also meet a high frequency requirement. Therefore, a high-frequency speaker module is not to be disposed in the electronic device. This can simplify a structure of the electronic device. In addition, voice coil mass Mms of the two voice coils is relatively large, and a BL of a multi-path magnetic circuit and the two voice coils are relatively large, to enable the speaker module to have a lower Fo and a larger amplitude. Therefore, better low-frequency performance and low-frequency sensitivity are obtained, a capability of playing sound on speaker is increased by 2 dB to 3 dB, greatly improving effect of playing sound on speaker.

In a possible implementation of the first aspect, the magnet assembly further includes an inner magnet. The inner magnet is disposed in a gap between the first central magnet and the second central magnet. The inner magnet forms an inner magnetically conductive part. The inner magnet is magnetic, and can improve a magnetic field strength of a magnetic loop, to increase a driving force.

In a possible implementation of the first aspect, the side magnet includes a first side magnet, a second side magnet, a third side magnet, and a fourth side magnet. The first side magnet and the second side magnet are respectively disposed on two opposite sides of the central magnet set. An arrangement direction of the first side magnet and the second side magnet is the same as an arrangement direction of the first central magnet and the second central magnet in the central magnet set. The third side magnet and the fourth side magnet are respectively disposed on the other two opposite sides of the central magnet set. An arrangement direction of the third side magnet and the fourth side magnet is perpendicular to an arrangement direction of the first central magnet and the second central magnet in the central magnet set. The side magnets are laid out properly and have a proper quantity, which can reduce structural complexity of the magnetic circuit system while ensuring a magnetic field strength.

In a possible implementation of the first aspect, the inner magnet is located between the third side magnet and the fourth side magnet. The inner magnet includes a first inner magnet segment and a second inner magnet segment. The first inner magnet segment is disposed close to the third side magnet and integrally formed with the third side magnet. The second inner magnet segment is disposed close to the fourth side magnet and integrally formed with the fourth side magnet. In this way, the magnet assembly includes a relatively small quantity of magnets. This helps to reduce structure composition complexity of the magnet assembly.

In a possible implementation of the first aspect, the inner magnet is integrally formed with the third side magnet and the fourth side magnet. In this way, the magnet assembly includes a relatively small quantity of magnets. This helps to reduce structure composition complexity of the magnet assembly.

In a possible implementation of the first aspect, the magnetic circuit system further includes a first magnetically conductive yoke and a second magnetically conductive yoke. The first magnetically conductive yoke is disposed on a surface, close to the diaphragm assembly, of the magnet assembly. The second magnetically conductive yoke is disposed on a surface, away from the diaphragm assembly, of the magnet assembly. The first magnetically conductive yoke is magnetically connected to the second magnetically conductive yoke in a gap between the first central magnet and the second central magnet to form the inner magnetically conductive part. This structure is simple and easy to implement.

In a possible implementation of the first aspect, the first magnetically conductive yoke includes a first central magnetically conductive yoke, a second central magnetically conductive yoke, an edge magnetically conductive yoke, and an inner magnetically conductive yoke. The first central magnetically conductive yoke is disposed on a surface, close to the diaphragm assembly, of the first central magnet. The second central magnetically conductive yoke is disposed on a surface, close to the diaphragm assembly, of the second central magnet. The edge magnetically conductive yoke is disposed on a surface, close to the diaphragm assembly, of the side magnet. The inner magnetically conductive yoke is disposed between the first central magnetically conductive yoke and the second central magnetically conductive yoke. The inner magnetically conductive yoke is magnetically connected to the second magnetically conductive yoke in a gap between the first central magnet and the second central magnet to form the inner magnetically conductive part. This structure is simple and easy to implement.

In a possible implementation of the first aspect, the magnet assembly further includes an intermediate magnetically conductive yoke. The intermediate magnetically conductive yoke is disposed in the gap between the first central magnet and the second central magnet. A surface, close to the diaphragm assembly, of the intermediate magnetically conductive yoke is in magnetic contact with the inner magnetically conductive yoke. A surface, away from the diaphragm assembly, of the intermediate magnetically conductive yoke is in magnetic contact with the second magnetically conductive yoke. The intermediate magnetically conductive yoke forms the inner magnetically conductive part. The inner magnetically conductive yoke is made of a magnetically conductive material such as yoke iron. The yoke iron has good toughness and is easy to process and form. Therefore, the yoke iron can replace the inner magnet for use in a small-sized core.

In a possible implementation of the first aspect, the inner magnetically conductive yoke includes a first protruding part that protrudes in a direction close to the second magnetically conductive yoke. The first protruding part is in magnetic contact with the second magnetically conductive yoke. The first protruding part forms the inner magnetically conductive part. The inner magnetically conductive yoke is made of a magnetically conductive material such as yoke iron. The yoke iron has good toughness and is easy to process and form. Therefore, a protruding part can be formed, to be magnetically connected to the second magnetically conductive yoke. In some embodiments, the first protruding part is molded by stamping. In this way, structure composition complexity of the magnetic circuit system is relatively low, and costs are relatively small.

In a possible implementation of the first aspect, the second magnetically conductive yoke includes a second protruding part that protrudes in a direction close to the inner magnetically conductive yoke. The second protruding part is in magnetic contact with the inner magnetically conductive yoke. The second protruding part forms the inner magnetically conductive part. The second magnetically conductive yoke is made of a magnetically conductive material such as yoke iron. The yoke iron has good toughness and is easy to process and form. Therefore, a protruding part can be formed, to be magnetically connected to the inner magnetically conductive yoke. In some embodiments, the second protruding part is molded by stamping. In this way, structure composition complexity of the magnetic circuit system is relatively low, and costs are relatively small.

In a possible implementation of the first aspect, the inner magnetically conductive yoke includes a first protruding part that protrudes in a direction close to the second magnetically conductive yoke. The second magnetically conductive yoke includes a second protruding part that protrudes in a direction close to the inner magnetically conductive yoke. The first protruding part is in magnetic contact with the second protruding part. The first protruding part and the second protruding part form the inner magnetically conductive part. In this way, a protruding height of the first protruding part and the second protruding part may be reduced. When the first protruding part and the second protruding part are molded by stamping, a yield of molding is relatively high.

In a possible implementation of the first aspect, the first voice coil set includes a first voice coil and a first voice coil former connected between the diaphragm assembly and the first voice coil, and the second voice coil set includes a second voice coil and a second voice coil former connected between the diaphragm assembly and the second voice coil. The first voice coil former and the first voice coil former are respectively configured to adjust a height of the first voice coil and a height of the first voice coil, to adjust the first voice coil and the first voice coil into the magnetic circuit system while ensuring vibration space of the diaphragm assembly. Based on this, a material with a low density and a high structural strength may be selected for the first voice coil former and the second voice coil former, such as aluminum alloy or magnesium-aluminum alloy, to reduce a load of the magnetic circuit system.

In a possible implementation of the first aspect, the first voice coil former includes a first support part and two second support parts. The first support part is disposed between the diaphragm assembly and the first voice coil. The second voice coil former includes a third support part and two fourth support parts. The third support part is disposed between the diaphragm assembly and the second voice coil. The two second support parts are respectively disposed at two corners, away from the third support part, of the first support part. A positive electrode and a negative electrode of the first voice coil are respectively led out from parts, adjacent to the two corners, of the first voice coil. It may also be considered that the two second support parts and the positive electrode and the negative electrode of the first voice coil are respectively located at two corners, away from the second voice coil set, of the first voice coil set. The two fourth support parts are respectively disposed at two corners, away from the first support part, of the third support part. A positive electrode and a negative electrode of the second voice coil are respectively led out from parts, adjacent to the two corners, of the second voice coil. It may also be considered that the two fourth support parts and the positive electrode and the negative electrode of the second voice coil are respectively located at two corners, away from the first voice coil set, of the second voice coil set.

In a possible implementation of the first aspect, the second support part includes a first outward extension unit, a first connection unit, and a second outward extension unit. The first outward extension unit extends from an outer edge of the first support part to a direction away from a central axis of the first support part. The first connection unit extends from an outer end of the first outward extension unit to a side, away from a top surface, of a bottom surface of the first support part. The outer end of the first outward extension unit means an end, away from the central axis of the first support part, of the first outward extension unit. The second outward extension unit extends from one end, away from the first support part, of the first connection unit to a direction away from the central axis of the first support part. In this way, a section of the second support part is of a “right-angled zigzag”-shaped structure. In some other embodiments, the section of the second support part may also be of a “right-angled horizontal U”-shaped structure, an “L”-shaped structure, or an “I”-shaped structure. This structure is simple and easy to implement.

In a possible implementation of the first aspect, the fourth support part includes a third outward extension unit, a second connection unit, and a fourth outward extension unit. The third outward extension unit extends from an outer edge of the third support part to a direction away from a central axis of the third support part. The second connection unit extends from an outer end of the third outward extension unit to a side, away from a top surface, of a bottom surface of the third support part. The outer end of the third outward extension unit means an end, away from the central axis of the third support part, of the third outward extension unit. The fourth outward extension unit extends from one end, away from the third support part, of the second connection unit to a direction away from the central axis of the third support part. In this way, a section of the fourth support part is of a “right-angled zigzag”-shaped structure. In some other embodiments, a section of the fourth support partmay also be of a “right-angled horizontal U”-shaped structure, an “L”-shaped structure, or an “I”-shaped structure. This structure is simple and easy to implement.

In a possible implementation of the first aspect, the core further includes a basket. The first voice coil set and the second voice coil set are located in the basket. The core further includes a second electrical connection structure. The second electrical connection structure includes a first electrical connection unit and a second electrical connection unit. The first electrical connection unit is connected between a positive electrode of the first voice coil set, a negative electrode of the first voice coil set, and the basket. The second electrical connection unit is connected between a positive electrode of the second voice coil, a negative electrode of the second voice coil, and the basket. In this way, electrodes of the first voice coil set and electrodes of the second voice coil set are respectively led out by using the first electrical connection unit and the second electrical connection unit, and a layout is proper.

In a possible implementation of the first aspect, the basket includes a first side and a second side that are opposite to each other. The first voice coil set is located between the first edge and the second voice coil set. The second voice coil set is located between the first voice coil set and the second edge. The first electrical connection unit is connected between the positive electrode of the first voice coil set, the negative electrode of the first voice coil set, and the first side. The second electrical connection unit is connected between the positive electrode of the second voice coil set, the negative electrode of the second voice coil set, and the second side. In this way, a connection path between the first electrical connection unit and the second electrical connection unit is relatively short, and a volume may be manufactured to be relatively small. This helps to reduce costs for the core.

In a possible implementation of the first aspect, the positive electrode and the negative electrode of the first voice coil set are respectively located at two corners, away from the second voice coil set, of the first voice coil set, and the positive electrode and the negative electrode of the second voice coil set are respectively located at two corners, away from the first voice coil set, of the second voice coil set. In this way, the connection path between the first electrical connection unit and the second electrical connection unit is further shortened, and a volume of the second electrical connection structure is reduced.

In a possible implementation of the first aspect, the first electrical connection unit includes two first ends and two second ends. The two first ends of the first electrical connection unit are respectively connected to a positive electrode and negative electrode of the first voice coil set. The two second ends of the first electrical connection unit are fastened to the basket. In the first electrical connection unit, the two first ends of the first electrical connection unit are respectively electrically connected to the two second ends of the first electrical connection unit. The second electrical connection unit includes two first ends. The two first ends of the second electrical connection unit are respectively connected to a positive electrode and negative electrode of the second voice coil set. The two second ends of the second electrical connection unit are fastened to the basket. In the second electrical connection unit, the two first ends of the second electrical connection unit are respectively electrically connected to the two second ends of the second electrical connection unit. In this way, four external terminals of the core are formed.

In a possible implementation of the first aspect, the second electrical connection structure further includes an electrical connection segment. The electrical connection segment electrically connects one second end of the first electrical connection unit to one second end of the second electrical connection unit. In this way, the first voice coil set and second voice coil set are connected in series through the electrical connection segment, to enable the core to be externally connected through two external terminals. This reduces the number of external terminals of the core.

In a possible implementation of the first aspect, the core further includes a basket. The first voice coil set and the second voice coil set are located in the basket. The core further includes a second electrical connection structure. The second electrical connection structure includes a first electrical connection unit and a second electrical connection unit. The first electrical connection unit is connected between one electrode of the first voice coil set, one electrode of the second voice coil set, and the basket. The second electrical connection unit is connected between the other electrode of the first voice coil set, the other electrode of the second voice coil set, and the basket. The electrode of the first voice coil set is one of a positive electrode and a negative electrode, and the other electrode of the first voice coil set is the other of the positive electrode and the negative electrode. The electrode of the second voice coil set is one of a positive electrode and a negative electrode, and the other electrode of the second voice coil set is the other of the positive electrode and the negative electrode.

In a possible implementation of the first aspect, the basket includes a first side and a second side that are opposite to each other. An arrangement direction of the first voice coil set and the second voice coil set is the same as an extension direction of the first side or the second side. Two corners, away from the second voice coil set, of the first voice coil set are respectively a first corner and a second corner. The first corner is located between the first side and the second corner. The second corner is located between the first corner and the second side. The electrode of the first voice coil set is located at the first corner, and the other electrode of the first voice coil set is located at the second corner. Two corners, away from the first voice coil set, of the second voice coil set are respectively a third corner and a fourth corner. The third corner is located between the first side and the fourth corner. The fourth corner is located between the third corner and the second side. The electrode of the second voice coil set is located at the third corner, and the other electrode of the second voice coil set is located at the fourth corner. In this way, a distance between the first corner or the third corner and the first side is relatively short, and a distance between the second corner or the fourth corner and the second short side is relatively short. This shortens a connection path between the first electrical connection unit and the second electrical connection unit and reduces a volume of the second electrical connection structure.

In a possible implementation of the first aspect, the first electrical connection unit includes two first ends and two second ends. The two first ends of the first electrical connection unit are respectively connected to the electrode of the first voice coil set and the electrode of the second voice coil set. The two second ends of the first electrical connection unit are connected to the basket. In the first electrical connection unit, the two first ends of the first electrical connection unit are respectively electrically connected to the two second ends of the first electrical connection unit. The second electrical connection unit includes two first ends. The two first ends of the second electrical connection unit are respectively connected to the other electrode of the first voice coil set and the other electrode of the second voice coil set. In addition, the second electrical connection unit electrically connects the two first ends of the second electrical connection unit. In this way, the first voice coil set and the second voice coil set are connected in series through the second electrical connection unit, and two external terminals of the core may be formed only by using the two second ends of the first electrical connection unit. This enables a quantity of external terminals of the core to be small and facilitates external connection.

In a possible implementation of the first aspect, the basket is rectangularly frame-shaped. The basket includes a first short side and a second short side that are opposite to each other. The first short side forms a first side. The second short side forms a second side. In this way, a volume of the first electrical connection unit and a volume of the second electrical connection unit may be further reduced.

In a possible implementation of the first aspect, the basket further includes a first long side and a second long side that are opposite to each other. The first long side and the second long side respectively form the first side and the second side.

In a possible implementation of the first aspect, the diaphragm assembly includes a dome. The dome is rectangularly plate-shaped. The first voice coil set and the second voice coil set are fastened to the dome, and the first voice coil set and the second voice coil set are arranged in a length direction of the dome. This structure is simple, and layout space of an inner magnetically conductive part is large. The inner magnetically conductive part may be formed by using an inner magnet, to increase a magnetic field strength of the magnetic circuit system.

In a possible implementation of the first aspect, the diaphragm assembly includes a dome. The dome is rectangularly plate-shaped. The first voice coil set and the second voice coil set are fastened to the dome, and the first voice coil set and the second voice coil set are arranged in a width direction of the dome. In this way, a sectional width of the dome in a symmetrical plane between the first voice coil set and the second voice coil set is relatively large, and a strength is relatively high. When the first voice coil set and the second voice coil set are in a process of driving the diaphragm assembly, the dome is hardly broken when the first voice coil set and the second voice coil set cannot move synchronously due to an error.

In a possible implementation of the first aspect, each of the first electrical connection unit and the second electrical connection unit includes a body, a first branch, and a second branch. The body includes a central part and two second ends located on two opposite sides of the central part. The first branch includes a head end, one first end, and a connection segment connected between the head end and the first end. The second branch includes a head end, the other first end, and a connection segment connected between the head end and the other first end. Both the head end of the first branch and the head end of the second branch are connected to the central part of the body. For example, both the head end of the first branch is connected to the head end of the second branch, and the head end of the first branch and the head end of the second branch are spliced, and then connected to the central part of the body. In some other embodiments, the head end of the first branch and the head end of the second branch are respectively connected to different positions at the central part of the body, and a gap is formed between the head end of the first branch and the head end of the second branch. The two first ends are spaced apart, and are spaced apart from the body. The two first ends are movable ends, and may move relative to the body. When a force is applied to the two first ends, to enable the two first ends to move relative to the body, the connection segment of the first branch may be driven to move relative to the body and the connection segment of the second branch. This may prevent the first electrical connection unit from hindering movement of the first voice coil set.

In a possible implementation of the first aspect, the core further includes four auxiliary diaphragms. Each auxiliary diaphragm includes a first fastening part, a bent annular part, and a second fastening part that are sequentially connected. The first fastening part is located on an inner side of the bent annular part. The second fastening part is located on an outer side of the bent annular part. A sectional shape of the bent annular part is arc-shaped or approximately arc-shaped, and an extension track of the bent annular part is arc-shaped. The bent annular part is concave. When an external force is applied to the bent annular part, deformation can occur. This enables the first fastening part and the second fastening part to vibrate relative to each other. First fastening parts of the two auxiliary diaphragms are fastened to ends, away from the diaphragm assembly, of the first voice coil set, and first fastening parts of the other two auxiliary diaphragms are fastened to ends, away from the diaphragm assembly, of the second voice coil set. The second fastening parts of the four auxiliary diaphragms are all fastened to the basket. In this way, ends, away from the diaphragm assembly, of the voice coil sets (including the first voice coil set and the second voice coil set) are supported on the basket by using the four auxiliary diaphragms. This can enable the voice coil sets to be back in position, prevent the voice coil sets from vibrating during operation, and prevent generation of rolling vibration.

In a possible implementation of the first aspect, both the bent annular part of the auxiliary diaphragm and a bent annular part of a diaphragm in the diaphragm assembly are concave. In this way, during vibration of the voice coil set, a deformation direction of the bent annular part of the diaphragm in the diaphragm assembly is the same as a deformation direction of the bent annular part of the auxiliary diaphragm. This may better suppress swinging of the voice coil set. In some other parallel embodiments that produce same effect, both the bent annular part of the diaphragm in the diaphragm assembly and the bent annular part of the auxiliary diaphragm are convex.

In a possible implementation of the first aspect, central axes of the bent annular parts of the four auxiliary diaphragms are respectively collinear with central axes of four rounded corners of the bent annular parts in the diaphragm. In this way, a resistance force of the diaphragm and the auxiliary diaphragm to the voice coil set may be reduced, to ensure smooth vibration of the voice coil set.

In a possible implementation of the first aspect, radii of the bent annular parts of the four auxiliary diaphragms may be respectively equal to or different from radii of the four rounded corners of the bent annular parts in the diaphragm.

According to a second aspect, some embodiments of this application provide a speaker module. The speaker module includes a housing and the core described in any one of the foregoing technical solutions. The core is disposed in the housing, and the housing is separated by a diaphragm assembly of the core into a front cavity and a rear cavity. A first voice coil set, a second voice coil set, and a magnetic circuit system of the core are located in the rear cavity. A sound output channel is disposed at the housing, and the front cavity is connected to the sound output channel.

Because the speaker module provided in the embodiments of this application includes the core described in any one of the foregoing technical solutions, by using the speaker module or the core, a same technical problem can be resolved, and same effect can be achieved.

According to a third aspect, some embodiments of this application provide an electronic device. The electronic device includes an external housing, a main board, and the speaker module described in the foregoing technical solution. The main board and the speaker module are disposed in the external housing, the speaker module is electrically connected to the main board, a sound output hole is provided at the external housing, and a sound output channel is connected to the sound output hole.

Because the electronic device provided in some embodiments of this application includes the speaker module described in the foregoing technical solutions, audio performance of the electronic device can be improved while a thinning design of the electronic device is met.

In embodiments of this application, terms “first”, “second”, “third”, and “fourth” are used merely for the purpose of description, and shall not be construed as indicating or implying relative importance or implying a quantity of indicated technical features. Therefore, a feature limited by “first”, “second”, “third”, and “fourth” may explicitly or implicitly include one or more features.

In the embodiments of this application, the term “include”, “have”, or any other variant thereof is intended to cover non-exclusive inclusion, so that a process, a method, an article, or an apparatus that includes a series of elements includes not only those elements but also other elements that are not explicitly listed, or includes elements inherent to such process, method, article, or apparatus. In absence of more constraints, an element preceded by “includes a . . . ” does not preclude the existence of other identical elements in the process, method, article, or apparatus that includes the element.

In the embodiments of this application, “and/or” indicates merely an association relationship for describing associated objects and represents the presence of three relationships. For example, A and/or B may represent the presence of three cases: only A, both A and B, and only B. In addition, the character “/” in this specification generally indicates an “or” relationship between the associated objects.

This application provides an electronic device. T the electronic device is an electronic device that has a sound play function. Specifically, the electronic device includes but is not limited to a mobile phone, a tablet personal computer (tablet personal computer), a laptop computer (laptop computer), a personal digital assistant (personal digital assistant, PDA), a personal computer, a notebook computer, an in-vehicle device, a wearable device, a personal stereo, a radio, or the like. The wearable device includes but is not limited to a smart band, a smart watch, a smart head-mounted display, smart glasses, or the like.

is a three-dimensional view of an electronic deviceaccording to some embodiments of this application. The electronic deviceshown inis described by using a tablet computer as an example. In the example, the electronic deviceincludes a screen, a back housing, a main control board, an interface main board, a battery, and a speaker module. The main control board, the interface main board, the battery, and the speaker moduleare located inside the electronic device. Therefore, dashed lines are used to show outlines.

It may be understood thatand the following related drawings show only some components included in the electronic device. Actual shapes, actual sizes, actual positions, and actual constructions of these components are not limited byand the following accompanying drawings. In addition, when the electronic deviceis a device of some other shapes, the electronic devicemay not include the screen, the interface main board, and the battery.

In the embodiments shown in, the electronic deviceis rectangularly flat plate-shaped. To facilitate description of the following embodiments, an XYZ coordinate system is established. Specifically, it is specified that a length direction of the electronic deviceis an X-axis direction, a width direction of the electronic deviceis a Y-axis direction, and a thickness direction of the electronic deviceis a Z-axis direction. It may be understood that the coordinate system of the electronic devicemay be flexibly set based on an actual requirement, which is not specifically limited herein. In some other embodiments, the electronic devicemay also be of a squarely flat plate shape, a circularly flat plate shape, an ovally flat plate shape, or the like.

The screenis used to display an image, a video, and the like. The screenincludes a transparent cover plate and a display screen (a panel, also referred to as a display panel). The transparent cover plate is laminated with the display screen, and is fastened by adhesive or the like. The transparent cover plate is mainly used to protect the display screen and prevent dust. A material of the transparent cover plate includes but is not limited to glass. The display screen may be a flexible display screen, or may be a rigid display screen. For example, the flexible display screen may be an organic light-emitting diode (organic light-emitting diode, OLED) display screen, an active-matrix organic light-emitting diode (active-matrix organic light-emitting diode, AMOLED) display screen, a mini light-emitting diode (mini organic light-emitting diode) display screen, a micro light-emitting diode (micro organic light-emitting diode) display screen, a micro organic light-emitting diode (micro organic light-emitting diode) display screen, a quantum dot light-emitting diode (quantum dot light-emitting diodes, QLED) display screen, a liquid crystal display (liquid crystal display, LCD) screen, or the like.